Disable mangling and compression

Summary:
This is not doing much in terms of size. We're talking 780 bytes after
PACK compression but we're losing a lot of information in our errors
(before have symbolication).

We may reenable this at some point but I think it might be safe to leave it to this.

Reviewed By: nikoant

Differential Revision: D27887636

fbshipit-source-id: 15affeac588db667914320cbd098f7041b8b9c09

desktop/scripts/build-utils.ts

@@ -109,6 +109,8 @@ const minifierConfig = {
     keep_fnames: true,
     module: true,
     warnings: true,
+    mangle: false,
+    compress: false,
   },
 };